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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 302 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.44 × 15 =
  2. 2.51 × 15 =
  3. 3.47 × 15 =
  4. 4.28 × 15 =
  5. 5.18 × 15 =
  6. 6.13 × 15 =
  7. 7.23 × 15 =
  8. 8.22 × 15 =
  9. 9.25 × 15 =
  10. 10.7 × 15 =
  11. 11.10 × 15 =
  12. 12.28 × 15 =
  13. 13.6 × 15 =
  14. 14.24 × 15 =
  15. 15.61 × 15 =
  16. 16.41 × 15 =
  17. 17.34 × 15 =
  18. 18.37 × 15 =
  19. 19.52 × 15 =
  20. 20.50 × 15 =
  21. 21.36 × 15 =
  22. 22.23 × 15 =
  23. 23.27 × 15 =
  24. 24.11 × 15 =
  25. 25.22 × 15 =
  26. 26.35 × 15 =
  27. 27.4 × 15 =
  28. 28.16 × 15 =
  29. 29.19 × 15 =
  30. 30.53 × 15 =
  31. 31.27 × 15 =
  32. 32.7 × 15 =
  33. 33.6 × 15 =
  34. 34.63 × 15 =
  35. 35.21 × 15 =
  36. 36.37 × 15 =
  37. 37.62 × 15 =
  38. 38.55 × 15 =
  39. 39.30 × 15 =
  40. 40.28 × 15 =

Answer key

  1. 660
  2. 765
  3. 705
  4. 420
  5. 270
  6. 195
  7. 345
  8. 330
  9. 375
  10. 105
  11. 150
  12. 420
  13. 90
  14. 360
  15. 915
  16. 615
  17. 510
  18. 555
  19. 780
  20. 750
  21. 540
  22. 345
  23. 405
  24. 165
  25. 330
  26. 525
  27. 60
  28. 240
  29. 285
  30. 795
  31. 405
  32. 105
  33. 90
  34. 945
  35. 315
  36. 555
  37. 930
  38. 825
  39. 450
  40. 420

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